P1.1 Changes In Energy Stores

Question 1

Give 5 examples of energy stores

Answer 1

• Chemical
• Kinetic
• Gravitational potential
• Elastic potential
• Thermal

Question 2

Give some examples of chemical energy stores

Answer 2

Fuels, foods, chemical found in batteries

Question 3

How is chemical energy transferred?

Answer 3

In chemical reactions

Question 4

What does a kinetic energy store describe?

Answer 4

The energy an object has because it is moving

Question 5

What does the gravitational potential energy store describe?

Answer 5

The energy stored in an object at height

Question 6

What are some examples of kinetic energy?

Answer 6

Runners, buses, comets

Question 7

What are some examples of gravitational potential energy stores?

Answer 7

Aeroplanes, kite, mugs on a table

Question 8

What does elastic potential energy describe?

Answer 8

The energy stored when an object is stretched or squashed.

Question 9

What are some examples of elastic potential energy?

Answer 9

Drawn catapults, compressed springs, inflated balloons.

Question 10

What does thermal energy describe?

Answer 10

The energy a substance has because of its temperature

Question 11

True or false: energy can be transferred from one store to another

Answer 11

True

Question 12

How can we show energy transfer?

Answer 12

By using energy transfer diagrams

Question 13

What is the law of the conservation of energy?

Answer 13

Energy cannot be created or destroyed

Question 14

What is chemical energy?

Answer 14

The energy stores in chemical bonds, such as those between molecules

Question 15

What are some examples of thermal energy stores?

Answer 15

Human bodies, hot coffee, stoves, ice

Ice particles vibreate more slowly but they still have thermal energy

Question 16

Describe the energy transfers that happen in a kettle

Answer 16

The current in the kettle’s heating element transfers energy to the thermal energy store of the water and the kettle, so the kettle warms up and the water starts to boil